Grinding wheel



March 10, 1931. T N 1,195,354

" GRINDING WHEEL I Filed April 19, 1927 Y IN VENTO R .r 1M hm 50M. mi

Patented Mar. 10, 1931 I UNITED STATES PATENT OFFICE FRANK J'. TONE, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO THiE CARIBORUNDUM COMPANY, OF NIAGARA FALLS, NEW YORK, A CORPORATION OF PENNSYLVANIA- GRINDING WHEEL Application filed April 19,

Figure 1 :is a plan viewjof my improved My invention relates to the securing of segmental grinding blocks in chucks, and is blocks 7 designed to provide a simple, new and effective means for holding the grinding blocks and allowing adjustment thereof to different positions when worn.

In the drawings, in which I show one form of my invention, 2 represents a chuck body having an inner annular flange 3 and a concentric outer flange 4, both flanges projecting in the same direction. The outer flange is provided at proper intervals with sets of holes or recesses 5, spaced at suitable distances from the wheel body 2, while the inner flange is provided at suitable intervals with set screw devices 6, adj usted from the inside and adapted to engage segmental grinding- The grinding blocks 7 are fitted between the inner and outer flanges and with their ends preferably spaced apart as shown; and in the form shown, each block is provided with two projections 9, 9, each adapted to register with one of the sets of holes or recesses 5 in the outer flange.

In the form shown, these projections are formed by pins 10, which are cemented within the lower portions of the block segments and project a slight distance, say one-eighth of an inch, beyond the outer peripheral surface of the segment.

When a new segment is put in the chuck, the set screws 6 for that segment are' drawn back, the segment is dropped into place, and its projections engaged with the lower holes of the two sets of holes in the outer chuck flange. The pair of set screws are then engaged with the inner surface of the segment to force it in place and secure it. The segments normally project beyond the inner edges of the flanges. When the segment wears down to a point near the edge of the chuck,

1927. Serial No. 184,896.

the set screws are loosened, the segment is slipped out ofits engaging holes and raised to the next pair of holes, and is then again tightened in position by the set screws. When again worn, it is lifted to the upper set of holes, thus giving three adjustments.

The advantages of my invention will be obvious to those skilled in the art,-since a simple and effective means is provided for holding the grinding segments and wheel, while allowing for adjustment for wear.

The essence of the invention lies in a projection and recess engagement between the block and the chuck. The projection if formed on the segment, may consist of an integral projection on the abrasive block itself, or the projection may be secured to the segment with a clamp. On the other hand, the projection may be on one of the flanges to engage a corresponding recess in the block; and other means than the setscrews may be used for tightening the blocks in place when the projection and recess engagement is made.

Many variations may be made in the form of the chuck, the grinding blocks and engaging means, without departing from my invention.

I claim:

1. A segmental grinding wheel assembly comprising a holder having an annular channel on one face thereof, the sides of which extend in the direction of the axis of the wheel assembly, a series of blocks in the channel extending in the direction of the axis of the wheel, pins cemented in said blocks, the sides of the channel having openings at various axial distances for the reception of the ends of the pins, and means for pressing said pins into selected openings and said blocks to the holder.

2. A segmental grinding wheel assembly comprising a holder having an annular channel in one face thereof, the sides of which extend in the direction of the axis of the wheel assembly, a series of blocks in the channel extending in the direction of the axis of the wheel, said channel being of greater width than the thickness of the blocks, pins cemented in said blocks, the sides of the channel having openings at various axial distances for the reception of the ends of the pins, and means for pressing said pins into selected openings and said blocks to the holder.

3. A segmental grinding wheel assembly comprising a holder having two continuous concentric flanges on one face thereof between which there is a channel, an annular series of blocks in the channel, pins cemented in said blocks, the sides of the channel having openings at various axial distances for the reception of the ends of the pins, and means for pressing said pins into selected openings and said blocks to the holder.

4. A segmental grinding wheel assembly comprising a holder having two continuous concentric flanges on one face thereof between which there is a channel, an annular series of blocks in the channel, pins cemented in said blocks, the sides of the channel having openings at various axial distances for the reception of the ends of the pins, and adjust able clamping means for securing the blocks in the channel.

5. A segmental grinding wheel assembly comprising a holder having two annular concentric flanges on one face thereof between which a channel is formed, an annular series of segmental blocks in the channel, pins cemented in said vblocks, one of the flanges having openings at various axial distances for the reception of the ends of the pins, and means for pressing said pins into selected openings and said blocks to the holder.

6. A segmental grinding wheel assembly comprising a holder having two continuous concentric flanges on one face thereof, and between which is formed a channel, an an nular series of segmental blocks in the channel, said blocks having pins cemented therein, one of said flanges having openings at various distances from the bottom thereof for receiving the pins of the blocks and by means of which the blocks may be secured at various positions in the channel as they are Worn down, said channel being of greater width than the blocks, and adjustable clamping meanscarried by the other flange for pressing said pins into selected openings and said blocks to the holder.

7. A segmental grinding wheel assembly comprising a holder having an annular channel on one face thereof, the sides of which extend in the direction of the axis of the wheel assembly, and a series of blocks in the channel extending in the direction of the axis of the wheel, said blocks having pins cemented therein which project beyond the block and engage with at least one of the sides of the channel.

8. A segmental grinding wheel assembly comprising aholder having two annular concentric flanges on one face thereof between which a channel is formed, an annular series of segmental blocks in the channel, said blocks having pins cemented therein adapted to cooperate with recesses in at least one of said flanges to allow adjustment of the blocks when worn.

9. A segmental grinding wheel assembly comprising a holder having two continuous concentric flanges on one face thereof, and between which is formed a channel, an annular series of segmental blocks in the channel, said blocks being provided with pins cemented in holes in said blocks, one of said flanges having recesses at various distances from the bottom thereof for receiving the pins and by means of which the blocks may be secured at various positions in the channel as they are worn, said channel being of greater width than the blocks, and adjustable clamping means carried by the other flange for securing the blocks in the channel.

10. A segmental grinding wheel, comprising a holder having an annular channel in one face thereof, the sides of which extend in the direction of the axis of the wheel, a series of blocks in the channel extending in the direction of the axis of the wheel, pins cemented in the lower portions of the blocks and projecting a short distance therefrom, the radially outward side of said channel having holes disposed at diflerent axial distances for receiving said pins, and means connected to the radially inward side of said channel for pressing said blocks against the radially outward side of the channel and said pins into said holes.

In testimony whereof I have hereunto set my hand.

FRANK J. TONE. 

